import java.util.ArrayList;
import java.util.List;

public   class _list{
    public static void main(String[] args) {
        List i = new ArrayList<>();
        i.add("fuck");
        i.add("caonima");
        i.add("haha");
        System.out.println("list"+i);
        System.out.println(i.get(2));
        i.add(1, "fuckyou");
        System.out.println(i);
        System.out.println(i.indexOf("fuck"));
        i.remove(0);
        i.set(0, "en");
        System.out.println(i);
        System.out.println(i.subList(0, 1));
        Iterator i = new _list();
        while
    }
}
